Figures 5.6. Spermatophores lying within the bursae of the female reproductive tracts of moth species from four different genera (Lepidoptera: Noctuidae).
The sperm leave via the narrow end of each spermatophore, which has been deposited so that its opening lies opposite the “seminal duct” leading to the spermatheca (not drawn). The bursa on the far right contains two spermatophores, indicating that the female has remated. (After Williams 1941; Eberhard 1985)